Picture-slide-projection apparatus



Dec. 21 1926. 1,611,843

E1 VAN ALTENA PICTURE SLIDE PROJECTION APPARATUS Filed July 25, 1922 2Sheets-Sheet 1 CENTER LINE OF MIRROR. 1' PICTURE INVENTOR EdwardVanAZZerza BY Wm ATTORN EY Dec. 21 192a. 1,611,843

E. VAN ALTENA PICTURE SLIDE PROJECTION APPARATUS Filed July 25, 1922 2Sheets-Sheet r INVENTOR Edward? 7&22 fi/li'elza,

Gabi

ATTORNEY for fr Patented D... 21.1926.

UNITED STATES EDWARD VAN AL'I'ENA. OF NEW YORK, N, Y.

1,611,843 PATENT ounce.)

' Application filed July 25,

matically when suitable power is applied thereto, to move the slidesseriatim to the display oint and return them to the magazine or holder,the'machine being adapted to operate irrespective of the number morethan one of the slides in the ma azine.

The preferred embodiment o my invention is illustrated in theaccompanying drawings in which a Figure 1 is aside elevation of mydevlce with a part of its casing broken away.

Fi 2 is a detail view of the mechanism olding the slide in, andreleasing1t om, display position,

Fig. 3 1s a partial perspectiveview of the means for lifting orconveying a slide from the magazine to the dis lay point.

Figs. 4 and .5 show etails of the picker arms action and mounting.

Fig. 6 is a perspective view of a slide holder.

Fig. 7 is a partial vertical transverse view taken along the lines 7-7in Fig. 1.

Fig. 8 shows a detail of the inclined gu des and the manner ofengagement therewith of the slide holders.

Fig. 9 shows a detail of the operation of the p1cker arms upon theslides in the magazine. I

Fig. 10 is a detail of a modified pawl.

Fig. 11 is a detail of a modified operating mechanism for the bellcrank.

Fig. 12 is a detail of a modified picker arm.

In the embodiment of my invention chosen for the purpose ofillustration, the mechanism is enclosed in a casing or cabinet 11,having an aperturewhich is closed by means of any suitable material toform a picture screen 13. Concentrically arranged with this screen andupon the opposite wall of thecabinet, is a reflecting disc, plate ormirror 14, adjustably mounted on the wall of the cabinet by the ballhinge joint 15, whereby the mirror can be ad usted in any direction.

Within the cabinet is the projecting mechanism which consists of a framesupporting a suitable lighting element 17, a

condenser 18, and a lens 19, the alignment 192a. semi no. man.

of the light 17, condenser 18 and lens 19 being such that it is at anangle to the cabinet and being such that the mirror 14, when properlyadjusted will deflect a ray of light coming to it through the condenserand lens whereby it is reflected to the screen 13. at 7 right anglesthereto. The right angled relation between the screen and the reflectedor deflected ray is important and the mirror is made adjustable to.permit to be maintained at all times.

Adjacent the upperface' oi the container 18 is an inclined dis laystation or point 20 for the slides 21 and in Figure 1 it will be seenthat one of the slides 21 is at thedisplay point in display position.Extending from the display position are twoinclined guides 22 and 23which convey a slide from display position to the magazine 24. The

slides comprise the usual transparency 25 adapted to be placed in asliding holder 26 which is substantially U-shaped. The slide holderhas-laterally extending channels '27 into which the transparency 25 isremovably this relation placed and the holder has a lip 28 at its bottomto support the transparency. The holder is preferably reinforced aboutits edges by a wire 29 and this wire terminates in two laterallyextending hooks 30 having angular ends 31. Herein where reference ismade to a slide, it is to be understood that I mean a transparency andits supporting holder or equivalent elements.

The frame 16 has a bottom extension 32 on which is supported standardsor uprights 33 and 34 which respectively support guides 22 and 23. Theguides 22 and 23 terminate in a stop 35 for preventing the slides fromsliding oif of the guides. That portion of the guides adjacent the stop35 may be horizontal to receive any desired number of slides, say two.This facilitates the pick-up lever to lift a slide from the magazine,without interferingwith adjacent slides.

As my machine is devised to automatically display the slides one afteranother, I have devised automatic means for conveying or elevating aslide from the magazine into display position and then after an intervalof display, releasing the slide and guiding it automatically back to themagazine. These means comprise a slide conveying means or slide carrier,which may be a pivotally mounted carrier of the type shown herein,comprising two arms 37 and 37 pivoted at 39 to the frame. These arms aresufliciently spaced apart to straddle a slide. Their upper extremitiesare bent over wherein each is a pivoted picker arm 38 having asubstantlally spear sha ed head 39 thereon. The head 39 may ave theconfiguration as seen in Fig. 12 if desired, as this form preventsaccidental picking up of more than one slide. The undercut or angularportion 56 prevents a slide from falling off the hook when the carrieris moving the slide to dis play position. spring 40 hearing thereagainstwhich tends to press them downwardly. An adjustable stop 41, orother'suit'able mechanism, is prorided to limit their downward movement.

The carrier is adapted to be rotated by means of a motor 42 operatingthrough friction discs or gears 43 and 44, whereby the effective speedof the motor is reduced and the wheel 44, by means of the worm 45,rotates the gear 46 which has connected thereto a connecting rod 47adjustably secured to the carrier at 48, whereby rotation of the gear 46oscillates the carrier. Therefore, when the carrier 36 oscillates, itmoves downwardly until it takes the position shown in dotted lines at Awhich is the limit of its downward movement. As the carrier movesupwardly, the picker arms 38 move upwardly against the hooks 30 of theslide (Fig. 9) whereby their inclined face 39 en ages the hook 30 of thelowermost slide in tide magazine and continued upward movement of thecarrier causes the lowermost slide to be elevated out'of the magazineand as it is elevated, its hooks 30 slide along the inclined face 39 ofthe picker arms 38 until they slide over the spear head and aresupported on the upper edge of the picker arms adjacent to the carrierarms 37 and 37' as shown in Fig. 4. The carrier proceeds upwardly intoits extreme upward osition marked B, whereupon the slide is reed fromits carrier by being slid upwardly by shearing action of bell-crankmeans thereunder and is deposited at the display point 20 in displayposition by means hereinafter described.

As the slide is to be held at the display point in display osition for apredetermined period an then released to slide therefrom into themagazine, I provide means intermedially operated to hold the slide indisplay position (in which-the hooks 30 of the slide are above, free andclear of the picker-arm 38) and then to release it therefrom and thesemeans include a cam 50 on the gear wheel 46 adapted to operate a springpressed pivoted bell crank arrangement 51 having two supportin members52. The bell crank arrangement s adapted to hold a slide in displayposition when the bell crank 51 is in one position, as shown in fulllines in Fig. 1 and dotted lines in Fig. 5,

and adapted to release the slide from display position when in theposition shown in These picker arms'have a full lines in Fig. 2, as morefully hereinafter described. A pin 57 in the bell crank '51 engages thecam surface, and a spring 58' returns the part 51 to its initialposition after actuation by the cam. The spring may be dispensed with,however, if a slot 59 is provided within the cam 50, as shown in Fig. 11ada ted to receive the pin 57. Associated with tiie bell crank 51 andoperated by a pin 53 thereon is a pivoted pawl element 54 carried byeach of the guides 22 and 23, whereby, when the slide is released fromdisplay position as shown in Fig. 2 which slides therefrom until itshooks 30 are caught by the pawls 54. Return movement of the bell cranks51'cause the pawls to be depressed belore the level of the guides 22 and23 whereby the slide is released from the pawls and slides to themagazine 24. I have found that the form of pawl shown in Fig. 10 is verysatisfactory, and the type of slot 53' prevents binding of the pin 53While engaging the part 54.

The slide thus engaging the pawl on its descent is forced to astandstill from which point it continues to the magazine slowly,

which prevents undue noise and accidental jumping 0d the guideways.

The movement of the bell crank 51 whereby it moves intermedially intoand out of position to support a slide in display position is so timedthat as the carrier and slide reach position B from the magazine 24 tothe display point, that is, the position B, the slide supporting members52 move inwardly to engage the slide. Because of their inclined faces55, (the slide is by engagement therewith to move) the slide and itshooks 30 are moved upwardly alon the members 20 (of the display point)until the books 30 are held raised above the top of the picker arms 38,whereby the carrier is free to return to its A position, leaving theslide at the display point. After the desired display interval, rotationof the motor and the gear 46 mbves the bell crank outwardly with itsslide supporting members 52 and the slide falls from display positionuntil it is caught by the pawls 54. In the meantime, the car.- rier haspicked up the next slide from the magazine and conveys it to the displaypoint. During passage of the carrier from the position A to position Bwith its new slide, the slide supports 52 are moving inwardly, wherebythe pawls 54 releases the slide to let it pass downwardly along theguides 22 and 23 to the magazine, and continued inward movement of theslide supports 52 engage the bottom of the slide, move it upwardly tolet the carrier release it from the slide, and so on, this cycle beingrepeated indefinitely.

What I claim is 1. A projection apparatus for ieture slides having amagazine, a slide isplay point, means for supporting a slide at the llUdisplay point, means for carrying a slide from the magazine to thedisplay point, and bell crank means roducing a shearing action forforcing t e slide upwardly and free from the carrying means.

2. A projection apparatus for picture slides having a magazine for theslides, a display point for the slides, and a pivoted carrier forautomatically conveying one slide after another from the magazine to thedisplay point and pivoted arms on said carrier for picking up andholding said slides.

3. A projection apparatus for picture slides having a magazine, adisplay point for the slides, means for conveying slides from themagazine to the dis lay point, angled means for guiding a sli e from thedisplay point to the magazine, and pawl means for breaking the travel ofa slide along the guiding means.

4;. The device of claim 2, with spring pressed arms on said carrier forpicking up one slide at a time.

5. The device of claim 3, said display 25 point including a pivotedmember upon which the slide is supported, said pivoted member actuatingsaid travel breaking means.

6. The device of claim 3, said travel breaking means including a memberhaving a slot therein, and a peripheral projection thereon.

7. The device of claim ,3, said travel breaking means including apivoted sub stantially U-shaped member.

8. The device of claim 3, said travel breaking means including a pivotedsubstantially U-shaped member, said pivot point being adjacent the lowerpart of the U.

9. The device of claim 3, said supporting means including a hell crankhaving a lug thereon.

10. The device of claim 3, said supporting means including a bell crankhaving a lug thereon, and a motor operated cam engaging said lug toimpart rotative movement to said bell crank.

In testimony whereof I have aflixed my signature to this specification.

EDWARD VAN ALTENA.

